As DC transmission voltage increases. the DC wall bushing becomes longer. and a supporting insulator is introduced to keep the conductor straight. Under extremely high electric fields coupled with a thermal gradient. https://www.roneverhart.com/HP-Pavilion-15-eg1053cl-15-6-FHD-Touch-Intel-Core-i5-1235U-3-30-GHz-Intel-Iris-Xe-Graphics-12-GB-DDR4-RAM-512-GB-SSD-/